21369914767 has 8 divisors (see below), whose sum is σ = 22719779424. Its totient is φ = 20055111648.

The previous prime is 21369914737. The next prime is 21369914773. The reversal of 21369914767 is 76741996312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21369914767 - 2⁷ = 21369914639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21369914737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8764128 + ... + 8766565.

It is an arithmetic number, because the mean of its divisors is an integer number (2839972428).

Almost surely, 2^21369914767 is an apocalyptic number.

21369914767 is a deficient number, since it is larger than the sum of its proper divisors (1349864657).

21369914767 is a wasteful number, since it uses less digits than its factorization.

21369914767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17530769.

The product of its digits is 3429216, while the sum is 55.

The spelling of 21369914767 in words is "twenty-one billion, three hundred sixty-nine million, nine hundred fourteen thousand, seven hundred sixty-seven".